HYDAC HLB 1400 User Manual
Page 15
Instruction Manual HYDACLab
®
03.03.2008
15
13.1.1 Reset sensor (Reset function)
In the sub-menu "Reset sensor", if you confirm with "OK", the sensor will be reset to its
initial state (see Section 6 "Reset function"). Any stored data, including the referencing
phase, will be completely deleted; the settings for the analogue or switching outputs are
retained. An error message will appear which can be ignored. If you press "Cancel" you
return to the main menu without resetting the sensor.
13.1.2 Output 1
This menu point branches out to a menu in which output 1 can be configured as a
switching or analogue output. In addition a link can be set up between the switching output
and the trend.
• Analogue output
Here you can set the display variables, and the type of analogue output can be configured
as current output (4 .. 20mA) or voltage output (0 .. 10V).
Possible display variables:
-
Temperature Display
range:
-25°C
...
+100°C
-
Viscosity Display
range:
-30%
...
+30%
-
Dielectric Constant
Display range:
-30% ... +30%
-
Relative humidity
Display range:
0% ... 100%
-
Status Display
range:
0
...
64
By pressing "Ok" the changed data is saved in the sensor. By pressing "Cancel" the data
is discarded and you return to the previous menu.
• Switching output
Here you can set the variables to be monitored and the values and switching direction
(NC, NO).
In the display panel you can select which of the following variables within their limits will be
monitored with the switching output:
-
Temperature Monitoring
range:
-25°C
...
+100°C
-
Viscosity Monitoring
range:
-30%
...
+30%
-
Dielectric Constant
Monitoring range:
-30% ... +30%
-
Relative humidity
Monitoring range:
0%. ... 100%
In the "switch on point“ box, indicate the value at which the output will switch on when
the pre-set variable is exceeded.
In the "switch off point" box, indicate the value at which the output will switch off when
the pre-set variable is exceeded.
Use "switching direction“ to determine whether the output GND switches to the value of
the supply voltage U
b
(NO function) or it switches from the value of the supply voltage U
b
to GND (NC function).
By pressing "Ok" the changed data is saved in the sensor. By pressing "Cancel" the data
is discarded and you return to the previous menu.
• Trend
A special feature is the link between the switching output and the trend. Here the switching
output switches when the pre-set variables are exceeded in either direction. The following
values are pre-set, but can be changed in the sub-menu "Trend":
-
Temperature:
Switch on point: >80°C
Switch-off point: <80°C
-
Viscosity:
Switch on point: 10%
Switch-off point: 8%
-
Dielectric Constant:
Switch on point: 15%
Switch-off point: 10%
-
Rel. humidity:
Switch on point: >85%
Switch-off point: <85%
Switching direction: NO or NC contact